confusionmatrix.html

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<A NAME="m_ClassNames"><!-- --></A><H3>
m_ClassNames</H3>
<PRE>
protected java.lang.String[] <B>m_ClassNames</B></PRE>
<DL>
<DD>Stores the names of the classes</DL>

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<A NAME="ConfusionMatrix(java.lang.String[])"><!-- --></A><H3>
ConfusionMatrix</H3>
<PRE>
public <B>ConfusionMatrix</B>(java.lang.String[]&nbsp;classNames)</PRE>
<DL>
<DD>Creates the confusion matrix with the given class names.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classNames</CODE> - an array containing the names the classes.</DL>
</DD>
</DL>

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<A NAME="makeWeighted(weka.classifiers.CostMatrix)"><!-- --></A><H3>
makeWeighted</H3>
<PRE>
public <A HREF="../../../weka/classifiers/evaluation/ConfusionMatrix.html">ConfusionMatrix</A> <B>makeWeighted</B>(<A HREF="../../../weka/classifiers/CostMatrix.html">CostMatrix</A>&nbsp;costs)
                             throws java.lang.Exception</PRE>
<DL>
<DD>Makes a copy of this ConfusionMatrix after applying the
 supplied CostMatrix to the cells. The resulting ConfusionMatrix
 can be used to get cost-weighted statistics.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>costs</CODE> - the CostMatrix.<DT><B>Returns:</B><DD>a ConfusionMatrix that has had costs applied.<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if the CostMatrix is not of the same size
 as this ConfusionMatrix.</DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public java.lang.Object <B>clone</B>()
                       throws java.lang.CloneNotSupportedException</PRE>
<DL>
<DD>Creates and returns a clone of this object.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/Matrix.html#clone()">clone</A></CODE> in class <CODE><A HREF="../../../weka/core/Matrix.html">Matrix</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a clone of this instance.<DT><B>Throws:</B><DD><CODE>java.lang.CloneNotSupportedException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public int <B>size</B>()</PRE>
<DL>
<DD>Gets the number of classes.<DD><DL>
<DT><B>Returns:</B><DD>the number of classes</DL>
</DD>
</DL>
<HR>

<A NAME="className(int)"><!-- --></A><H3>
className</H3>
<PRE>
public java.lang.String <B>className</B>(int&nbsp;index)</PRE>
<DL>
<DD>Gets the name of one of the classes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the index of the class.<DT><B>Returns:</B><DD>the class name.</DL>
</DD>
</DL>
<HR>

<A NAME="addPrediction(weka.classifiers.evaluation.NominalPrediction)"><!-- --></A><H3>
addPrediction</H3>
<PRE>
public void <B>addPrediction</B>(<A HREF="../../../weka/classifiers/evaluation/NominalPrediction.html">NominalPrediction</A>&nbsp;pred)
                   throws java.lang.Exception</PRE>
<DL>
<DD>Includes a prediction in the confusion matrix.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pred</CODE> - the NominalPrediction to include<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if no valid prediction was made (i.e. 
 unclassified).</DL>
</DD>
</DL>
<HR>

<A NAME="addPredictions(weka.core.FastVector)"><!-- --></A><H3>
addPredictions</H3>
<PRE>
public void <B>addPredictions</B>(<A HREF="../../../weka/core/FastVector.html">FastVector</A>&nbsp;predictions)
                    throws java.lang.Exception</PRE>
<DL>
<DD>Includes a whole bunch of predictions in the confusion matrix.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>predictions</CODE> - a FastVector containing the NominalPredictions
 to include<DT><B>Throws:</B><DD><CODE>java.lang.Exception</CODE> - if no valid prediction was made (i.e. 
 unclassified).</DL>
</DD>
</DL>
<HR>

<A NAME="getTwoClassStats(int)"><!-- --></A><H3>
getTwoClassStats</H3>
<PRE>
public <A HREF="../../../weka/classifiers/evaluation/TwoClassStats.html">TwoClassStats</A> <B>getTwoClassStats</B>(int&nbsp;classIndex)</PRE>
<DL>
<DD>Gets the performance with respect to one of the classes
 as a TwoClassStats object.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>classIndex</CODE> - the index of the class of interest.<DT><B>Returns:</B><DD>the generated TwoClassStats object.</DL>
</DD>
</DL>
<HR>

<A NAME="correct()"><!-- --></A><H3>
correct</H3>
<PRE>
public double <B>correct</B>()</PRE>
<DL>
<DD>Gets the number of correct classifications (that is, for which a
 correct prediction was made). (Actually the sum of the weights of
 these classifications)<DD><DL>
<DT><B>Returns:</B><DD>the number of correct classifications</DL>
</DD>
</DL>
<HR>

<A NAME="incorrect()"><!-- --></A><H3>
incorrect</H3>
<PRE>
public double <B>incorrect</B>()</PRE>
<DL>
<DD>Gets the number of incorrect classifications (that is, for which an
 incorrect prediction was made). (Actually the sum of the weights of
 these classifications)<DD><DL>
<DT><B>Returns:</B><DD>the number of incorrect classifications</DL>
</DD>
</DL>
<HR>

<A NAME="total()"><!-- --></A><H3>
total</H3>
<PRE>
public double <B>total</B>()</PRE>
<DL>
<DD>Gets the number of predictions that were made
 (actually the sum of the weights of predictions where the
 class value was known).<DD><DL>
<DT><B>Returns:</B><DD>the number of predictions with known class</DL>
</DD>
</DL>
<HR>

<A NAME="errorRate()"><!-- --></A><H3>
errorRate</H3>
<PRE>
public double <B>errorRate</B>()</PRE>
<DL>
<DD>Returns the estimated error rate.<DD><DL>
<DT><B>Returns:</B><DD>the estimated error rate (between 0 and 1).</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Calls toString() with a default title.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../weka/core/Matrix.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../../weka/core/Matrix.html">Matrix</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the confusion matrix as a string</DL>
</DD>
</DL>
<HR>

<A NAME="toString(java.lang.String)"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>(java.lang.String&nbsp;title)</PRE>
<DL>
<DD>Outputs the performance statistics as a classification confusion
 matrix. For each class value, shows the distribution of 
 predicted class values.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>title</CODE> - the title for the confusion matrix<DT><B>Returns:</B><DD>the confusion matrix as a String</DL>
</DD>
</DL>
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